Decide Which Variable Has a Coefficient of 1 or -1 $2 y - x = 7$

Multiple Choice

Decide which variable has a coefficient of 1 or -1, and solve for that variable in terms of the other variable. $2 y - x = 7$

A) $x = 2 y + 7$
B) $x = 7 y + 2$
C) $x = 7 y - 2$
D) $x = 2 y - 7$
E) $x = 7 - 2 y$